A compact printed Yagi type antenna for GPS application

An experiment is performed on a thin dielectric substrate for the compact printed Yagi type antenna described theoretically in [1]. This time the SMA connector at the feed is taken into design considerations. Measured results show that this implemented antenna has a high directivity of 7.3 dBi, a front-to-back ratio of 11.6 dB, a cross-polarization level of −33.5 dB, and 3-dB beamwidths of 73° and 112° in the planes of θ = 90° and ϕ= 90°, respectively. The bandwidth is 9.1%, and the antenna efficiency is 92%. The proposed antenna is suitable for the global positioning system application in the mobile devices whose volumes are usually not sufficient for embedded antennas with good axial ratio (AR) values of right hand circular polarizations and good angular coverage of preferred AR values.

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